it's my life

Some cattle are standing in a field when a huge gust of wind blows. All the cows fall
over, but the bulls remain standing, bracing themselves against the wind.
After a moment the cows stand up and go back to their chewing.
Pretty soon, an even stronger wind blows. Again all of the cows are knocked to the
ground, but the bulls just carry on munching the grass.
Next a mini tornado comes through and all the cows are knocked clean into the next
field. The bulls’ just say, "Moo" and carry on munching!
Finally, one of the cows walks up to a bull and says, "How come the wind always knocks us over and you remain standing?"
"Isn't it obvious?" the bull replies. "We bulls wobble, but we don't fall down."